PR ld/13343

[deliverable/binutils-gdb.git] / gdb / sparc64-linux-tdep.c

diff --git a/gdb/sparc64-linux-tdep.c b/gdb/sparc64-linux-tdep.c
index 906fd122a5107c8dfeef83ddd40dd00f048d2e64..019af2b8a59c2c44db6fb5c52a566eea57dc5c80 100644 (file)
--- a/gdb/sparc64-linux-tdep.c
+++ b/gdb/sparc64-linux-tdep.c
@@ -1,6 +1,6 @@
 /* Target-dependent code for GNU/Linux UltraSPARC.
 
-   Copyright (C) 2003, 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
+   Copyright (C) 2003-2005, 2007-2012 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -30,6 +30,11 @@
 #include "symtab.h"
 #include "trad-frame.h"
 #include "tramp-frame.h"
+#include "xml-syscall.h"
+#include "linux-tdep.h"
+
+/* The syscall's XML filename for sparc 64-bit.  */
+#define XML_SYSCALL_FILENAME_SPARC64 "syscalls/sparc64-linux.xml"
 
 #include "sparc64-tdep.h"
 
@@ -108,6 +113,9 @@ sparc64_linux_step_trap (struct frame_info *frame, unsigned long insn)
 {
   if (insn == 0x91d0206d)
     {
+      struct gdbarch *gdbarch = get_frame_arch (frame);
+      enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+
       ULONGEST sp = get_frame_register_unsigned (frame, SPARC_SP_REGNUM);
       if (sp & 1)
        sp += BIAS;
@@ -121,7 +129,8 @@ sparc64_linux_step_trap (struct frame_info *frame, unsigned long insn)
         register save area.  The saved PC sits at a 136 byte offset
         into there.  */
 
-      return read_memory_unsigned_integer (sp + 192 + 128 + 136, 8);
+      return read_memory_unsigned_integer (sp + 192 + 128 + 136,
+                                          8, byte_order);
     }
 
   return 0;
@@ -147,7 +156,8 @@ sparc64_linux_supply_core_gregset (const struct regset *regset,
                                   struct regcache *regcache,
                                   int regnum, const void *gregs, size_t len)
 {
-  sparc64_supply_gregset (&sparc64_linux_core_gregset, regcache, regnum, gregs);
+  sparc64_supply_gregset (&sparc64_linux_core_gregset,
+                         regcache, regnum, gregs);
 }
 
 static void
@@ -155,7 +165,8 @@ sparc64_linux_collect_core_gregset (const struct regset *regset,
                                    const struct regcache *regcache,
                                    int regnum, void *gregs, size_t len)
 {
-  sparc64_collect_gregset (&sparc64_linux_core_gregset, regcache, regnum, gregs);
+  sparc64_collect_gregset (&sparc64_linux_core_gregset,
+                          regcache, regnum, gregs);
 }
 
 static void
@@ -174,6 +185,53 @@ sparc64_linux_collect_core_fpregset (const struct regset *regset,
   sparc64_collect_fpregset (regcache, regnum, fpregs);
 }
 
+/* Set the program counter for process PTID to PC.  */
+
+#define TSTATE_SYSCALL 0x0000000000000020ULL
+
+static void
+sparc64_linux_write_pc (struct regcache *regcache, CORE_ADDR pc)
+{
+  struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache));
+  ULONGEST state;
+
+  regcache_cooked_write_unsigned (regcache, tdep->pc_regnum, pc);
+  regcache_cooked_write_unsigned (regcache, tdep->npc_regnum, pc + 4);
+
+  /* Clear the "in syscall" bit to prevent the kernel from
+     messing with the PCs we just installed, if we happen to be
+     within an interrupted system call that the kernel wants to
+     restart.
+
+     Note that after we return from the dummy call, the TSTATE et al.
+     registers will be automatically restored, and the kernel
+     continues to restart the system call at this point.  */
+  regcache_cooked_read_unsigned (regcache, SPARC64_STATE_REGNUM, &state);
+  state &= ~TSTATE_SYSCALL;
+  regcache_cooked_write_unsigned (regcache, SPARC64_STATE_REGNUM, state);
+}
+
+static LONGEST
+sparc64_linux_get_syscall_number (struct gdbarch *gdbarch,
+                                 ptid_t ptid)
+{
+  struct regcache *regcache = get_thread_regcache (ptid);
+  enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+  /* The content of a register.  */
+  gdb_byte buf[8];
+  /* The result.  */
+  LONGEST ret;
+
+  /* Getting the system call number from the register.
+     When dealing with the sparc architecture, this information
+     is stored at the %g1 register.  */
+  regcache_cooked_read (regcache, SPARC_G1_REGNUM, buf);
+
+  ret = extract_signed_integer (buf, 8, byte_order);
+
+  return ret;
+}
+
 \f
 
 static void
@@ -181,6 +239,8 @@ sparc64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 {
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 
+  linux_init_abi (info, gdbarch);
+
   tdep->gregset = regset_alloc (gdbarch, sparc64_linux_supply_core_gregset,
                                sparc64_linux_collect_core_gregset);
   tdep->sizeof_gregset = 288;
@@ -192,7 +252,7 @@ sparc64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   tramp_frame_prepend_unwinder (gdbarch, &sparc64_linux_rt_sigframe);
 
   /* Hook in the DWARF CFI frame unwinder.  */
-  frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);
+  dwarf2_append_unwinders (gdbarch);
 
   sparc64_init_abi (info, gdbarch);
 
@@ -211,6 +271,13 @@ sparc64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 
   /* Make sure we can single-step over signal return system calls.  */
   tdep->step_trap = sparc64_linux_step_trap;
+
+  set_gdbarch_write_pc (gdbarch, sparc64_linux_write_pc);
+
+  /* Functions for 'catch syscall'.  */
+  set_xml_syscall_file_name (XML_SYSCALL_FILENAME_SPARC64);
+  set_gdbarch_get_syscall_number (gdbarch,
+                                  sparc64_linux_get_syscall_number);
 }
 \f